Different design

I ordered this part for my storm door. It is the part i need but i guess over the years the design has changed some. The door i have is around 10 yeasr old. The inside latch is what has broken. The 40-150 has an internal diamiter of .188 and the old one is .333. Is there another inside handle that can fit my door or do i have to order another entire kit? The only number on the door is a serial number A-144656? the last number is not readable. Please advise me what is the best thing to do.

Thank you for your help. I thought the inside piece should come out but i did not realize the allen screw is what was holding it in. Thank you for all your help and the rest of the staff. That is excellent customer service!!!! Thank you again.